How does raw material pretreatment affect the performance of tungsten discharge needles

In modern manufacturing, electrical discharge machining technology is widely used due to its superior processing performance. To ensure the efficiency and stability of the discharge needle, it is crucial to select high-purity tungsten powder as the raw material. High-purity tungsten powder can not only significantly improve the performance of the discharge needle, but also optimize its overall quality in many aspects.

Improve tungsten powder purity and reduce impurities
The selection of high-purity tungsten powder is the first step to ensure the performance of the discharge needle. High-purity tungsten powder has excellent electrical conductivity, corrosion resistance and high temperature resistance. These properties directly affect the stability and efficiency of the discharge needle during processing. Impurities in tungsten powder can be effectively removed through pre-treatment processes such as fine screening, washing and magnetic separation. The presence of impurities can lead to unstable discharge and shortened service life. Therefore, controlling the impurity content is the key to improving product quality.

Optimize particle size distribution and improve compressibility
Optimization of particle size distribution is an important step in improving discharge needle density and mechanical strength. Through screening and classification processing, the particle size of tungsten powder can be controlled within a specific range to ensure its uniformity. Uniform particle size distribution not only increases the density of the discharge needle, but also enhances its wear resistance. In addition, adding appropriate amounts of molding agents and lubricants during the pretreatment process can significantly improve the pressability of tungsten powder, thereby obtaining a higher density tungsten billet during the press molding process, which provides a good foundation for subsequent sintering and processing.

Improve sintering performance and density
The improvement of sintering performance is directly related to the final strength and hardness of the discharge needle. By adding an appropriate amount of sintering aids during the pretreatment process, the sintering process of tungsten powder can be effectively promoted and the density of the sintered body can be significantly improved. The increase in density not only enhances the mechanical properties of the discharge needle, but also extends its service life. In addition, the use of heat treatment technologies such as annealing can eliminate stress and defects within the tungsten billet, further improving its mechanical properties and processing performance. These measures ensure that the discharge needle can maintain stable discharge performance and good wear resistance during the electrical discharge machining process.

Enhance final product performance
Through the above optimization measures, the conductivity, wear resistance and corrosion resistance of the discharge needle can be significantly improved. High-purity tungsten powder and optimized particle size distribution can enhance the electrical conductivity of the discharge needle, thereby achieving more efficient and stable discharge during the electrical discharge machining process. At the same time, optimized pretreatment measures improve the hardness and strength of the discharge needle, increase its wear resistance, and reduce replacement frequency and operating costs. In harsh environments, high-purity tungsten powder and optimized pretreatment processes can also ensure the corrosion resistance of the discharge needle, further improving its stability and reliability.